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Integrate got slower in Version 3.0/Example

  • To: mathgroup at smc.vnet.net
  • Subject: [mg8945] Integrate got slower in Version 3.0/Example
  • From: Elias Saab <mathes at math.missouri.edu>
  • Date: Mon, 6 Oct 1997 01:59:15 -0400
  • Sender: owner-wri-mathgroup at wolfram.com

In version 2.2

In[1]:= Integrate[Sqrt[R^2-x^2-y^2],{x,-R,R},
        {y,-Sqrt[R^2-x^2],Sqrt[R^2-x^2]}]//Timing        


                            3
                      2 Pi R
Out[1]= {5.17 Second, -------}
                         3

In Version 3.0
Integrate[Sqrt[R^2-x^2-y^2],{x,-R,R},
	{y,-Sqrt[R^2-x^2],Sqrt[R^2-x^2]}]//Timing
Integrate::"gener": "Unable to check convergence"


                           3   
                      2 Pi R
Out[1]= {32.8 Second, -------}
                         3

I mentionned this to Wolfram before the release of 3.0. It seems
that nothing has been done to correct this.

Elias Saab



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